input: specify the default of I8042_KEYB in more correct manner

Creating multiple entries of "config FOO" often gives us bad
experiences.  In this case, we should specify "default X86"
as platforms that want this keyboard by default.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Acked-by: Marek Vasut <marex@denx.de>
Reviewed-by: Simon Glass <sjg@chromium.org>
diff --git a/drivers/input/Kconfig b/drivers/input/Kconfig
index d560328..b3873c1 100644
--- a/drivers/input/Kconfig
+++ b/drivers/input/Kconfig
@@ -17,6 +17,7 @@
 config I8042_KEYB
 	bool "Enable Intel i8042 keyboard support"
 	depends on DM_KEYBOARD
+	default X86
 	help
 	  This adds a driver for the i8042 keyboard controller, allowing the
 	  keyboard to be used on devices which support this controller. The